Hello,                                                                          
                                      
Bootstrapped.
AVX-512* tests on top of patch-set all pass
under simulator.

Is it ok for trunk?

gcc/
        * config/i386/sse.md
        (define_c_enum "unspec"): Add UNSPEC_PSHUFHW, UNSPEC_PSHUFLW.
        (define_insn "<mask_codefor>avx512bw_pshuflwv32hi<mask_name>"): New.
        (define_expand "avx512vl_pshuflwv3_mask"): Ditto.
        (define_insn "avx2_pshuflw_1<mask_name>"): Add masking.
        (define_expand "avx512vl_pshuflw_mask"): New.
        (define_insn "sse2_pshuflw_1<mask_name>"): Add masking.
        (define_insn "<mask_codefor>avx512bw_pshufhwv32hi<mask_name>"): New.
        (define_expand "avx512vl_pshufhwv3_mask"): Ditto.
        (define_insn "avx2_pshufhw_1<mask_name>"): Add masking.
        (define_expand "avx512vl_pshufhw_mask"): New.
        (define_insn "sse2_pshufhw_1<mask_name>"): Add masking.

--
Thanks, K

diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index f377a5e..133ba1e 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -129,6 +129,10 @@
   UNSPEC_SHA256MSG2
   UNSPEC_SHA256RNDS2
 
+  ;; For AVX512BW support
+  UNSPEC_PSHUFHW
+  UNSPEC_PSHUFLW
+
   ;; For AVX512DQ support
   UNSPEC_REDUCE
   UNSPEC_FPCLASS
@@ -11789,6 +11793,40 @@
    (set_attr "length_immediate" "1")
    (set_attr "mode" "TI")])
 
+(define_insn "<mask_codefor>avx512bw_pshuflwv32hi<mask_name>"
+  [(set (match_operand:V32HI 0 "register_operand" "=v")
+       (unspec:V32HI
+         [(match_operand:V32HI 1 "nonimmediate_operand" "vm")
+          (match_operand:SI 2 "const_0_to_255_operand" "n")]
+         UNSPEC_PSHUFLW))]
+  "TARGET_AVX512BW"
+  "vpshuflw\t{%2, %1, %0<mask_operand3>|%0<mask_operand3>, %1, %2}"
+  [(set_attr "type" "sselog")
+   (set_attr "prefix" "evex")
+   (set_attr "mode" "XI")])
+
+(define_expand "avx512vl_pshuflwv3_mask"
+  [(match_operand:V16HI 0 "register_operand")
+   (match_operand:V16HI 1 "nonimmediate_operand")
+   (match_operand:SI 2 "const_0_to_255_operand")
+   (match_operand:V16HI 3 "register_operand")
+   (match_operand:HI 4 "register_operand")]
+  "TARGET_AVX512VL && TARGET_AVX512BW"
+{
+  int mask = INTVAL (operands[2]);
+  emit_insn (gen_avx2_pshuflw_1_mask (operands[0], operands[1],
+                                GEN_INT ((mask >> 0) & 3),
+                                GEN_INT ((mask >> 2) & 3),
+                                GEN_INT ((mask >> 4) & 3),
+                                GEN_INT ((mask >> 6) & 3),
+                                GEN_INT (((mask >> 0) & 3) + 8),
+                                GEN_INT (((mask >> 2) & 3) + 8),
+                                GEN_INT (((mask >> 4) & 3) + 8),
+                                GEN_INT (((mask >> 6) & 3) + 8),
+                 operands[3], operands[4]));
+  DONE;
+})
+
 (define_expand "avx2_pshuflwv3"
   [(match_operand:V16HI 0 "register_operand")
    (match_operand:V16HI 1 "nonimmediate_operand")
@@ -11808,10 +11846,10 @@
   DONE;
 })
 
-(define_insn "avx2_pshuflw_1"
-  [(set (match_operand:V16HI 0 "register_operand" "=x")
+(define_insn "avx2_pshuflw_1<mask_name>"
+  [(set (match_operand:V16HI 0 "register_operand" "=v")
        (vec_select:V16HI
-         (match_operand:V16HI 1 "nonimmediate_operand" "xm")
+         (match_operand:V16HI 1 "nonimmediate_operand" "vm")
          (parallel [(match_operand 2 "const_0_to_3_operand")
                     (match_operand 3 "const_0_to_3_operand")
                     (match_operand 4 "const_0_to_3_operand")
@@ -11832,7 +11870,8 @@
    && INTVAL (operands[2]) + 8 == INTVAL (operands[6])
    && INTVAL (operands[3]) + 8 == INTVAL (operands[7])
    && INTVAL (operands[4]) + 8 == INTVAL (operands[8])
-   && INTVAL (operands[5]) + 8 == INTVAL (operands[9])"
+   && INTVAL (operands[5]) + 8 == INTVAL (operands[9])
+   && <mask_avx512bw_condition> && <mask_avx512vl_condition>"
 {
   int mask = 0;
   mask |= INTVAL (operands[2]) << 0;
@@ -11841,13 +11880,31 @@
   mask |= INTVAL (operands[5]) << 6;
   operands[2] = GEN_INT (mask);
 
-  return "vpshuflw\t{%2, %1, %0|%0, %1, %2}";
+  return "vpshuflw\t{%2, %1, %0<mask_operand10>|%0<mask_operand10>, %1, %2}";
 }
   [(set_attr "type" "sselog")
-   (set_attr "prefix" "vex")
+   (set_attr "prefix" "maybe_evex")
    (set_attr "length_immediate" "1")
    (set_attr "mode" "OI")])
 
+(define_expand "avx512vl_pshuflw_mask"
+  [(match_operand:V8HI 0 "register_operand")
+   (match_operand:V8HI 1 "nonimmediate_operand")
+   (match_operand:SI 2 "const_0_to_255_operand")
+   (match_operand:V8HI 3 "register_operand")
+   (match_operand:QI 4 "register_operand")]
+  "TARGET_AVX512VL && TARGET_AVX512BW"
+{
+  int mask = INTVAL (operands[2]);
+  emit_insn (gen_sse2_pshuflw_1_mask (operands[0], operands[1],
+                                GEN_INT ((mask >> 0) & 3),
+                                GEN_INT ((mask >> 2) & 3),
+                                GEN_INT ((mask >> 4) & 3),
+                                GEN_INT ((mask >> 6) & 3),
+                 operands[3], operands[4]));
+  DONE;
+})
+
 (define_expand "sse2_pshuflw"
   [(match_operand:V8HI 0 "register_operand")
    (match_operand:V8HI 1 "nonimmediate_operand")
@@ -11863,10 +11920,10 @@
   DONE;
 })
 
-(define_insn "sse2_pshuflw_1"
-  [(set (match_operand:V8HI 0 "register_operand" "=x")
+(define_insn "sse2_pshuflw_1<mask_name>"
+  [(set (match_operand:V8HI 0 "register_operand" "=v")
        (vec_select:V8HI
-         (match_operand:V8HI 1 "nonimmediate_operand" "xm")
+         (match_operand:V8HI 1 "nonimmediate_operand" "vm")
          (parallel [(match_operand 2 "const_0_to_3_operand")
                     (match_operand 3 "const_0_to_3_operand")
                     (match_operand 4 "const_0_to_3_operand")
@@ -11875,7 +11932,7 @@
                     (const_int 5)
                     (const_int 6)
                     (const_int 7)])))]
-  "TARGET_SSE2"
+  "TARGET_SSE2 && <mask_avx512bw_condition> && <mask_avx512vl_condition>"
 {
   int mask = 0;
   mask |= INTVAL (operands[2]) << 0;
@@ -11884,7 +11941,7 @@
   mask |= INTVAL (operands[5]) << 6;
   operands[2] = GEN_INT (mask);
 
-  return "%vpshuflw\t{%2, %1, %0|%0, %1, %2}";
+  return "%vpshuflw\t{%2, %1, %0<mask_operand6>|%0<mask_operand6>, %1, %2}";
 }
   [(set_attr "type" "sselog")
    (set_attr "prefix_data16" "0")
@@ -11912,10 +11969,44 @@
   DONE;
 })
 
-(define_insn "avx2_pshufhw_1"
-  [(set (match_operand:V16HI 0 "register_operand" "=x")
+(define_insn "<mask_codefor>avx512bw_pshufhwv32hi<mask_name>"
+  [(set (match_operand:V32HI 0 "register_operand" "=v")
+       (unspec:V32HI
+         [(match_operand:V32HI 1 "nonimmediate_operand" "vm")
+          (match_operand:SI 2 "const_0_to_255_operand" "n")]
+         UNSPEC_PSHUFHW))]
+  "TARGET_AVX512BW"
+  "vpshufhw\t{%2, %1, %0<mask_operand3>|%0<mask_operand3>, %1, %2}"
+  [(set_attr "type" "sselog")
+   (set_attr "prefix" "evex")
+   (set_attr "mode" "XI")])
+
+(define_expand "avx512vl_pshufhwv3_mask"
+  [(match_operand:V16HI 0 "register_operand")
+   (match_operand:V16HI 1 "nonimmediate_operand")
+   (match_operand:SI 2 "const_0_to_255_operand")
+   (match_operand:V16HI 3 "register_operand")
+   (match_operand:HI 4 "register_operand")]
+  "TARGET_AVX512VL && TARGET_AVX512BW"
+{
+  int mask = INTVAL (operands[2]);
+  emit_insn (gen_avx2_pshufhw_1_mask (operands[0], operands[1],
+                                GEN_INT (((mask >> 0) & 3) + 4),
+                                GEN_INT (((mask >> 2) & 3) + 4),
+                                GEN_INT (((mask >> 4) & 3) + 4),
+                                GEN_INT (((mask >> 6) & 3) + 4),
+                                GEN_INT (((mask >> 0) & 3) + 12),
+                                GEN_INT (((mask >> 2) & 3) + 12),
+                                GEN_INT (((mask >> 4) & 3) + 12),
+                                GEN_INT (((mask >> 6) & 3) + 12),
+                 operands[3], operands[4]));
+  DONE;
+})
+
+(define_insn "avx2_pshufhw_1<mask_name>"
+  [(set (match_operand:V16HI 0 "register_operand" "=v")
        (vec_select:V16HI
-         (match_operand:V16HI 1 "nonimmediate_operand" "xm")
+         (match_operand:V16HI 1 "nonimmediate_operand" "vm")
          (parallel [(const_int 0)
                     (const_int 1)
                     (const_int 2)
@@ -11936,7 +12027,8 @@
    && INTVAL (operands[2]) + 8 == INTVAL (operands[6])
    && INTVAL (operands[3]) + 8 == INTVAL (operands[7])
    && INTVAL (operands[4]) + 8 == INTVAL (operands[8])
-   && INTVAL (operands[5]) + 8 == INTVAL (operands[9])"
+   && INTVAL (operands[5]) + 8 == INTVAL (operands[9])
+   &&  <mask_avx512bw_condition> && <mask_avx512vl_condition>"
 {
   int mask = 0;
   mask |= (INTVAL (operands[2]) - 4) << 0;
@@ -11945,13 +12037,31 @@
   mask |= (INTVAL (operands[5]) - 4) << 6;
   operands[2] = GEN_INT (mask);
 
-  return "vpshufhw\t{%2, %1, %0|%0, %1, %2}";
+  return "vpshufhw\t{%2, %1, %0<mask_operand10>|%0<mask_operand10>, %1, %2}";
 }
   [(set_attr "type" "sselog")
-   (set_attr "prefix" "vex")
+   (set_attr "prefix" "maybe_evex")
    (set_attr "length_immediate" "1")
    (set_attr "mode" "OI")])
 
+(define_expand "avx512vl_pshufhw_mask"
+  [(match_operand:V8HI 0 "register_operand")
+   (match_operand:V8HI 1 "nonimmediate_operand")
+   (match_operand:SI 2 "const_0_to_255_operand")
+   (match_operand:V8HI 3 "register_operand")
+   (match_operand:QI 4 "register_operand")]
+  "TARGET_AVX512VL && TARGET_AVX512BW"
+{
+  int mask = INTVAL (operands[2]);
+  emit_insn (gen_sse2_pshufhw_1_mask (operands[0], operands[1],
+                                GEN_INT (((mask >> 0) & 3) + 4),
+                                GEN_INT (((mask >> 2) & 3) + 4),
+                                GEN_INT (((mask >> 4) & 3) + 4),
+                                GEN_INT (((mask >> 6) & 3) + 4),
+                 operands[3], operands[4]));
+  DONE;
+})
+
 (define_expand "sse2_pshufhw"
   [(match_operand:V8HI 0 "register_operand")
    (match_operand:V8HI 1 "nonimmediate_operand")
@@ -11967,10 +12077,10 @@
   DONE;
 })
 
-(define_insn "sse2_pshufhw_1"
-  [(set (match_operand:V8HI 0 "register_operand" "=x")
+(define_insn "sse2_pshufhw_1<mask_name>"
+  [(set (match_operand:V8HI 0 "register_operand" "=v")
        (vec_select:V8HI
-         (match_operand:V8HI 1 "nonimmediate_operand" "xm")
+         (match_operand:V8HI 1 "nonimmediate_operand" "vm")
          (parallel [(const_int 0)
                     (const_int 1)
                     (const_int 2)
@@ -11979,7 +12089,7 @@
                     (match_operand 3 "const_4_to_7_operand")
                     (match_operand 4 "const_4_to_7_operand")
                     (match_operand 5 "const_4_to_7_operand")])))]
-  "TARGET_SSE2"
+  "TARGET_SSE2 && <mask_avx512bw_condition> && <mask_avx512vl_condition>"
 {
   int mask = 0;
   mask |= (INTVAL (operands[2]) - 4) << 0;
@@ -11988,7 +12098,7 @@
   mask |= (INTVAL (operands[5]) - 4) << 6;
   operands[2] = GEN_INT (mask);
 
-  return "%vpshufhw\t{%2, %1, %0|%0, %1, %2}";
+  return "%vpshufhw\t{%2, %1, %0<mask_operand6>|%0<mask_operand6>, %1, %2}";
 }
   [(set_attr "type" "sselog")
    (set_attr "prefix_rep" "1")

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